Coronavirus has become more contagious – nearly one — third of a mutation of DNA, according to Hong Kong scientists. Now every carrier of SARS-CoV-2 can pass the infection to another four people, whereas previously only two or three. Shortly before the increase in infectivity of coronavirus confirmed mathematical model Russian researchers from Novosibirsk. The virus starts to more effectively penetrate the cells and to overcome the protection mechanisms.
Mutation of DNA has led to an increase in the infectivity of the coronavirus, a new type of 30%, said the Dean of the medical school of the University of Hong Kong, Gabriel Leung. His words, reports the South China Morning Post.
Each coronavirus-infected people can now transmit the infection to four others, said the scientist, giving advice to the authorities regarding the pandemic. In the March one carrier SARS-CoV-2 could infect 2.5-3 people. The most common mutated strain of coronavirus.
The main infectious diseases of the United States, Director of the National Institute of allergic and infectious diseases Anthony Fauci earlier also admitted that the coronavirus can mutate and its virulence may increase.
However, he noted that science is unable to say with certainty whether the virus is more dangerous due to mutations causing more serious health problems.
The increase in infectivity of coronavirus confirmed by Russian scientists in favor of this hypothesis shows built in Novosibirsk mathematical model.
“the Mutation of the virus increases the efficiency of its penetration into the cell, overcoming the relevant barriers and cellular defense mechanisms, resulting in increased infectivity 2.5-8 times,” — said in the Siberian branch of the Russian Academy of Sciences.
The team also noted that the mortality rate from coronavirus infection falls – now the numbers are about 2-3% versus 10% of those killed in the beginning of the pandemic.
Everything in the world was found six varieties of the coronavirus SARS-CoV-2 – these results scientists have achieved after analysis 10.4 thousand of his strains. The mutation rate of the coronavirus is similar to the figure for ordinary flu.
The high transmissibility of the coronavirus – the dangerous feature about this in may, said Chinese virologist, Professor Zhong Nanshan. SARS-CoV-2 is transmitted from person to person easier for seasonal influenza and is spreading faster middle East respiratory syndrome (MERS).
On 17 may, the head of Rospotrebnadzor Anna Popova warned the people of Russia that everyone will have to live in conditions of a pandemic coronavirus not only in summer but longer.
According to her, probably to observe the country introduced rules and to wear masks and gloves will have in the summer heat. It is necessary to reduce the risk of infection.
On 28 June, Russian President Vladimir Putin expressed hope that the country will be able to kill with the coronavirus “with dignity and with minimal�� losses”. He believes that Russia in the fight against COVID-19 will survive and all will survive. “But at what cost?” — said Putin.
This will help the country out of difficulty all that had been done previously. As an example, Putin called the growth of exports, industry and cash reserves. “And here’s what we have done in recent years, gives the opportunity to hope that we finally will come out of this situation with dignity and with minimal losses”, — concluded the President.
Coronavirus is transmitted by airborne droplets at a distance of 1-2 meters. In addition, you can become infected through contact with dirty hands to the eyes. The main symptoms — dry cough, shortness of breath, until respiratory failure, fever, weakness. Sometimes the disease is no pneumonia, only accompanied by a rare dry cough and low — grade fever- but less contagious person, but this is not.
In April, the head Federal mediko-biological Agency (FMBA) Veronika Skvortsova said that in 75% of cases, the coronavirus has no symptoms or mild. According to her, the virus is contagious, but less than other viruses. Skvortsova noted that 45% are asymptomatic infections, a 30% pass as normal SARS.
In the same month, scientists from the German University of Bonn have established the most likely route of transmission of coronavirus infection. Virologists conducted an experiment: they took samples from door handles and other items. Then tried to cultivate the virus in the laboratory, but have not found evidence of live virus in the samples. It became clear that the scenario of transmission through contact with objects is unlikely.
Experts have found that severe outbreaks of coronavirus was recorded after events. Thus, the most likely method of disease transmission — directly through close Association with infected.